Frictionless spring



E. D. BROWN.

FRICTIONLESS SPRING.

APPLICATION men mmzs, 1921.

1,387,041, Patented Aug. 9,1921.

P r OFFICE.

EARL 1). BROWN, or BAKERSFIELD, CALIFORNIA;

FRICTIONLESS SPRING. i

Specification of Letters Patent.v -Patented Aug.'9, 1921- Application filed J'anuary'29, 1921. Serial No. 440,928.

To all whom it may concern I Be it known that'I, EARL D. BROWN, a

citizen of the United States, residing at Bakersfield, in the county of Kern and State of California, have invented certain new i struction'of a spring which has its leaves so constructed as to receive rollers between each two leaves, and which roller construction is of such peculiar nature as will enable the operator to easily lubricate the leaves.

With these and other objects in view, my invention comprises certain novel combina' tions, constructions and arrangements of parts as will be hereinafter described, illustrated in the accompanying drawings, and more particularly pointed out in the ap-. pended claim.

In the drawings:

Figure 1 is a fragmentary view, in elevation of a spring constructed in accordance with the present invention.'

Fig. 2 is a fragmentary, enlarged view, in side elevation, of a portion of the spring.

Fig. 3 is a section, taken on line 3-3, Fig. 2, and looking in the direction of the arrows. V

Fig. 4 is a fragmentary, inverted, perspective view of one of the leaves.

Referring to the drawings by numerals, 1 designates the top leaf, and 2 the bottom leaf of the spring. 3 are the intermediate leaves, and clip 4 holds all of the leaves t0- gether. In the under face of each intermediate leaf 3 and near its outer end is. formed a recess 5, whichrecess is provided with an outer, vertical wall 6 and an inner,

, compartively long, beveled wall/7. A roller 8 is seated. in the recess 5,this roller being provided with flat endsthatbear againstthe sideedges ofthe leaves. The roller is prevented, by the vertical wall 6, from moving I too far outwardly, but by. reason of the beveled wall 7 the roller may movetoward the central portion of the spring, thereby further wedging or crowding contiguous leaves apart, to allow the easy insertion of a lubricant or graphite between the leaves, l

Further, the device offers a working spring for lighter loads, as "Weight will be carried mainly on the frictionless rollers 8, while added weight will bend the spring to a seat on the leaf below it, which can be kept well lubricated by means of the recesses in which the rollers work, offering abundant opportunity for the introduction of greases and oils.

While I have described the preferred embodiment of my invention, and have illustrated the same in the accompanying drawings, certainminor changes or alterations may appear .to oneskilled in the art to which this invention relates, during the extensive manufacture of the same and I, therefore,

reserve the right to make such alterations.

or vchanges as shallfairly fall within the scope of the appended claim. v

What I claim is: In a spring of the class described,the

combinationof a top and a'bottom leaf, in-

termediate leaves interposed between the top and bottom leaf, each intermediate leaf provided in its under face and near its end with a recess open at bothends, said recess provided with an outer, verticalwall and an inner, comparatively long, beveled wall, a

roller in each recess being prevented from' moving too far outwardly by the vertical wall and being permitted tomove inwardly over the beveled wall to cause the contiguous leaves to be spread apart, and said rollers provided with'flattened ends bearing against the side edges of the leaves, substantially as shown anddescribed.

In testimony whereofI hereunto aflix my signature.

, EARL D. BROWN. 

